Questions and Answers
What is the primary function of the mammalian corpus luteum?
Which statement correctly describes gonadotropin activity in a normal pregnant female?
Which statement regarding hormonal interaction is incorrect?
What does the term 'capacitation' specifically refer to?
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What factors influence changes in GnRH pulse frequency in females?
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What is a hysterectomy?
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Which hormone is produced by granulosa cells in the ovary and inhibits FSH secretion?
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During gametogenesis, which of the following cells is normally diploid?
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What is the correct pathway for the transport of sperm?
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Which of the following events is not associated with the initiation of parturition in humans?
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Ectopic pregnancies refer to which of the following?
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Which of the following hormones is produced by the placenta?
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In the context of fertilization, which scenario is optimal for sperm and ovum transport?
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In human females, meiosis-II is not completed until?
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What is the primary function of the zona pellucida?
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Which of the following combinations of structures is correctly matched to their function?
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Study Notes
Mammalian Corpus Luteum
- The primary function is the production of progesterone, crucial for maintaining pregnancy.
Gonadotropin Activity in Pregnant Females
- High levels of human chorionic gonadotropin (hCG) stimulate the synthesis of estrogen and progesterone, essential for embryo development.
Capacitation
- Capacitation refers to changes in the sperm before fertilization, necessary for successful fertilization to occur.
Hysterectomy
- A hysterectomy is a surgical procedure that involves the removal of the uterus.
Diploid Cells in Gametogenesis
- Spermatogonia are the only diploid cells during gametogenesis, as they undergo division to form sperm.
Initiation of Parturition
- Release of prolactin is not considered an important component in the initiation of parturition in humans. Key factors include prostaglandin synthesis, oxytocin release, and increased estrogen/progesterone ratio.
Ectopic Pregnancies
- Ectopic pregnancies occur when the embryo implants at a site other than the uterus, posing serious health risks.
Ovulation Events in Human Females
- A decrease in estradiol is not associated with ovulation; rather, an LH surge, full development of the Graafian follicle, and release of the secondary oocyte are key events.
Meiosis-II Completion
- In human females, meiosis-II is not completed until fertilization takes place.
Acellular Layer in Antral Follicle
- The zona pellucida represents the acellular layer in an antral follicle, providing protection and playing a role in fertilization.
Fertilization Feasibility
- Fertilization occurs effectively when sperm are transported simultaneously with the ovum to the ampullary-isthmic junction of the fallopian tube.
Incorrect Statements Regarding Hormones
- LH and FSH do not decrease gradually during the follicular phase, they are important for follicle development and ovulation.
GnRH Pulse Frequency Control
- Changes in gonadotropin-releasing hormone (GnRH) pulse frequency in females are controlled by circulating levels of estrogen and progesterone.
Inhibin Function
- Inhibin is produced by granulosa cells in the ovary and mainly inhibits the secretion of follicle-stimulating hormone (FSH).
Hormones Produced by the Placenta
- Several hormones, including hCG, hPL, estrogen, and progesterone, are produced by the placenta during pregnancy.
Pathway of Transport of Sperm
- The correct pathways for sperm transport are Rete testis → Efferent ductules → Epididymis → Vas deferens.
Matching Terms Related to Reproductive Biology
- Mons pubis corresponds to female external genitalia, antrum to Graafian follicle, trophectoderm to embryo formation, and nebenkern to sperm.
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Description
Test your knowledge on the role of mammalian corpus luteum and gonadotropin activity in pregnancy. This quiz covers essential concepts in reproductive biology, including hormone functions and their effects during pregnancy. Challenge yourself with questions designed to reinforce your understanding of reproductive physiology.